An electric propulsion module implementing thermal imaging auto focus

Abstract

The utility model relates to a kind of electric propulsion module for realizing thermal imaging automatic focusing, it includes lens and base, the lens is fixedly arranged in the front of the base, the base is provided with cavity towards the lens, loading platform is movably arranged in the cavity, detector is provided on the loading platform corresponding the lens, the loading platform is driven by power device to move forward and backward.The utility model is designed reasonably ingenious, by power device drives detector to move forward and backward, and lens is fixedly arranged in the base front, so that the volume of thermal imager can be designed smaller, and focusing can be quickly realized, improve the corresponding efficiency of focusing.

Description

Technical Field

[0001] This application relates to thermal imagers, and more particularly to an electric propulsion module for achieving automatic focusing in thermal imaging. Background Technology

[0002] In thermal imagers, focusing is typically achieved by changing the position of the lens elements, which yields better image quality and stability. However, this structure also increases the difficulty of miniaturizing the module because it requires physical space for the movement of the lens assembly, making it difficult to design a smaller thermal imager. Furthermore, moving the entire lens assembly results in a relatively large lens mass, slow movement speed, and low focusing speed.

[0003] The applicant uses a method where the lens remains stationary while the detector moves to focus, which allows for a smaller thermal imager and improved focusing speed. Utility Model Content

[0004] In view of at least one of the above technical problems, this application provides an electric propulsion module for realizing automatic focusing in thermal imaging.

[0005] An embodiment of the first aspect of this application provides an electrically driven propulsion module for achieving automatic focusing in thermal imaging, comprising a lens and a base. The lens is fixedly disposed in front of the base, and a cavity is provided on the base facing the lens. A loading platform is movably disposed in the cavity, and a detector is disposed on the loading platform corresponding to the lens. The loading platform is driven to move back and forth by a power device.

[0006] As a further improvement of this utility model, an auxiliary guide rod is provided on one side of the cavity and a guide post is provided on the other side. The loading platform is provided with holes that cooperate with the auxiliary guide rod and the guide post, and the auxiliary guide rod and the guide post are respectively inserted into the holes.

[0007] As a further improvement of this utility model, the power device includes a stepper motor, the output end of which is connected to a lead screw, and a movable pusher driven by the lead screw to move back and forth is provided on the lead screw. The movable pusher is fixedly connected to the loading platform by a connecting rod.

[0008] As a further improvement of this utility model, a second guide rod is fixed on the housing of the stepper motor, and a through hole is provided on the movable pusher to cooperate with the second guide rod.

[0009] As a further improvement of this utility model, a guide sleeve is provided on the loading platform corresponding to the guide post, and the guide post passes through the guide sleeve.

[0010] As a further improvement of this utility model, it also includes a control board, which is disposed on the base. Two optical shutters are arranged on the control board, and a baffle is provided on the loading platform corresponding to the two optical shutters. The two optical shutters correspond to the upper and lower limits of the travel of the baffle, respectively.

[0011] As a further improvement of this utility model, the control board is provided with a Hall magnetic sensor, and the loading platform is provided with a magnetic grid corresponding to the Hall magnetic sensor.

[0012] As a further improvement of this utility model, the movable pusher is provided with a thread that cooperates with the lead screw.

[0013] As a further improvement of this utility model, the front end face of the base is provided with a top cover, and the top cover is provided with a window corresponding to the cavity.

[0014] As a further improvement of this utility model, the top cover is fixed to the front end face of the base by screws.

[0015] The embodiments of this application have the following technical effects: The present invention is reasonably and ingeniously designed. By using a power device to drive the detector to move back and forth, and the lens is fixedly set in front of the base, the size of the thermal imager can be made smaller, and it can quickly achieve focusing, thereby improving focusing efficiency.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the loading platform and power unit in this utility model;

[0021] Figure 4 This is a schematic diagram of the cooperation between the optical shutter and the baffle in this utility model;

[0022] Figure 5 This is a schematic diagram of the loading platform and stepper motor in this utility model. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In the embodiments of this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0027] like Figures 1 to 5 As shown, an embodiment of this application provides an electric propulsion module for achieving automatic focusing in thermal imaging, which includes a lens 1 and a base 2. The lens 1 is fixedly disposed in front of the base 2. The base 2 has a cavity 21 facing the lens 1. A loading platform 3 is disposed in the cavity 21 and can move back and forth. A detector 4 is disposed on the loading platform 3 corresponding to the lens 1. The loading platform 3 is driven to move back and forth by a power device.

[0028] The lens 1 is fixed in front of the cavity 21, and the detector 4 is facing the lens 1. The loading platform 3 drives the detector 4 to move back and forth, thereby achieving the purpose of automatic focusing by moving the detector 4.

[0029] An auxiliary guide rod 22 is provided on one side of the cavity 21, and a guide post 23 is provided on the other side. The loading platform 3 is provided with holes that cooperate with the auxiliary guide rod 22 and the guide post 23, and the auxiliary guide rod 22 and the guide post 23 are respectively inserted into the holes. Due to the setting of the auxiliary guide rod 22 and the guide post 23, the loading platform 3 moves smoothly without shaking or vibration, and the imaging quality is stable.

[0030] The power unit includes a stepper motor 51, the output end of which is connected to a lead screw 52. A movable thruster 53, driven to move back and forth by the lead screw 52, ​​is mounted on the lead screw 52. A connecting rod 54 is fixedly connected to the loading platform 3. The connecting rod 54 connects the movable thruster 53 to the loading platform 3, allowing the loading platform 3 to move along with the movable thruster 53. In other embodiments, power can be provided by other power units, and other connection methods can be used to drive the loading platform 3.

[0031] A second guide rod 55 is fixed to the housing of the stepper motor 51, and the movable pusher 53 has a through hole that mates with the second guide rod 55. Due to the setting of the second guide rod 55 and the fact that the stepper motor is fixed to the base 2, the movable pusher 53 will move forward or backward when the stepper motor rotates forward or backward.

[0032] The loading platform 3 is provided with a guide sleeve corresponding to the guide post 23, and the guide post 23 passes through the guide sleeve. Through the cooperation of the guide sleeve and the guide post 23, the movement of the loading platform 3 is more stable and does not shake.

[0033] It also includes a control board 6, which is mounted on the base 2. Two shutters 61 are arranged on the control board 6. A baffle 31 is provided on the loading platform 3 corresponding to the two shutters 61. The two shutters 61 correspond to the upper and lower limits of the travel of the baffle 31, respectively. The baffle 31 moves with the loading platform 3. When the baffle 31 is located at the upper or lower shutter 61, it blocks the signal of the shutter 61, allowing the thermal imager to determine the upper or lower limit position of the loading platform 3.

[0034] The control board 6 is equipped with a Hall effect magnetic sensor, which is a high-precision Hall effect sensor. A magnetic grating is provided on the loading platform 3 corresponding to this Hall effect magnetic sensor. When the loading platform 3 moves, the distance between the magnetic grating and the magnetic sensor changes, and the magnetic sensor outputs different voltage values. The thermal imager can then determine the relative position of the detector platform 4. If the thermal imager sends a signal to control the stepper motor to rotate, but the stepper motor loses its steps, the loading platform 3 may not move to the desired position. In this case, the magnetic sensor can be used to detect and compensate for the movement distance of the loading platform 3.

[0035] The movable pusher 53 is provided with a thread that mates with the lead screw 52. The movable pusher 53 and the lead screw 52 are threadedly engaged. Since the second guide rod 55 restricts the rotation of the movable pusher 53, the movable pusher 53 can only move back and forth with the forward and reverse rotation of the stepper motor.

[0036] The base 2 has an upper cover 7 on its front end surface, and the upper cover 7 has a window corresponding to the cavity 21.

[0037] The top cover 7 is fixed to the front end face of the base 2 by screws.

[0038] This utility model has a reasonable and ingenious design. By using a power device to drive the detector 4 to move back and forth, while the lens 1 is fixedly set in front of the base 2, the size of the thermal imager can be made smaller and can quickly achieve focusing, thus improving focusing efficiency.

[0039] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. An electrically driven propulsion module for achieving automatic focusing in thermal imaging, comprising a lens and a base, characterized in that, The lens is fixedly mounted in front of the base. The base has a cavity facing the lens. A loading platform is movable back and forth in the cavity. A detector is mounted on the loading platform corresponding to the lens. The loading platform is driven to move back and forth by a power device.

2. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 1, characterized in that, An auxiliary guide rod is provided on one side of the cavity, and a guide post is provided on the other side. The loading platform is provided with holes that cooperate with the auxiliary guide rod and the guide post, and the auxiliary guide rod and the guide post are respectively inserted into the holes.

3. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 1 or 2, characterized in that, The power unit includes a stepper motor, the output end of which is connected to a lead screw. The lead screw is equipped with a movable thruster that is driven to move back and forth. The movable thruster is fixedly connected to the loading platform by a connecting rod.

4. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 3, characterized in that, A second guide rod is fixed on the housing of the stepper motor, and a through hole is provided on the movable pusher to cooperate with the second guide rod.

5. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 3, characterized in that, The loading platform is provided with a guide sleeve corresponding to the guide post, and the guide post passes through the guide sleeve.

6. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 3, characterized in that, It also includes a control board, which is mounted on the base. Two shutters are arranged on the control board, and baffles are provided on the loading platform corresponding to the two shutters. The two shutters correspond to the upper and lower limits of the travel of the baffles, respectively.

7. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 6, characterized in that, The control board is equipped with a Hall magnetic sensor, and the loading platform is equipped with a magnetic grid corresponding to the Hall magnetic sensor.

8. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 3, characterized in that, The movable thruster is provided with a thread that mates with the lead screw.

9. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 1, characterized in that, The base has a top cover on its front end surface, and the top cover has a window corresponding to the cavity.

10. The electric propulsion module for achieving automatic focusing in thermal imaging according to claim 9, characterized in that, The top cover is fixed to the front end face of the base with screws.

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